Mixed-criticality Application Scheduling in Safety-involved Embedded Systems

The feasibility of efficient scheduling of real-time applications with different degrees of criticality in safety-involved systems is considered. The object of the study is the scheduling of tasks the solution of which is necessary to identify the pre-emergency state of electrical equipment, predict and detect faults, timely reconfigure to restore the initial operability and functionality. As a result of the study, for the considered safety-related system, a set of the most important functional tasks of hard real-time is identified, their temporal characteristics are determined, and the most expedient practical approach to scheduling tasks with mixed-criticality is proposed. The suggested approach is applied to the development of real-time system software in the safety-involved embedded system for monitoring the electrical equipment condition. The paper presents some trial results of the developed system for two aspects: the results of monitoring the state of electrical equipment using the example of thermal analysis and analysis of current distribution, also a selection of results reflecting the operation of the real-time scheduler.